Currently only two voice cast members are officially announced: Katsumi Fukuhara as Yukiya and Toshiki Masuda as Midori.
But you can provably guess who other cast are from the clip.
Following the first one featuring the protagonist Yukiya’s DJ performance, the official website for GoHands (K series)’s new TV anime W’z has started streaming a 90-second second PV introducing its main character voices and their intense battle scenes.